I set up notifications using the link given at the bottom of the forum index page:
https://blogtrottr.com/?subscribe=http://svardos.org/rss.php
It appears that the mails do not contain the plain text of the post which they're notifying about. This makes them less useful than otherwise.
The forum's RSS includes now the first 256 characters of each post.
I only hope that blogtrottr won't become crazy and re-mail hundreds of notifications. We'll see. :)
I found another problem with the blog trottr notifications. Not sure you can do anything about it though. The problem is that the individual mails sent for each post seem to all be disjoint, not sent and sorted into the same email thread. This causes a lot of entries in my mail client (k9 mail on android).
This is indeed not something I have control of. I am only providing an RSS feed, all the emailing/notification part is done by the RSS-to-email provider you subscribed to (blogtrottr in this case). The RSS format is very simple and there is nothing more I can set there.
I see two options: either try another rss-to-mail provider to see if it works better for you (for example FeedRabbit - but their notifications are sometimes a few hours late) or - and this could be the best option - use a real RSS client. I see there is a lot of RSS clients on google play, surely some of them are good. :-)